Recently a method in FIR filter design using cosine modulation was proposed. Given a prototype M -th band lowpass filter with cutoff frequency at π M , one can obtain a new filter with comparable frequency characteristics with rational cutoff frequency. In this paper, we extend the theory to the case of arbitrary cutoff frequency. The resulting method is corresponding to finding the equivalent ...

This paper reports a multitude of HSPICE simulation results corresponding to high-order (fifth, sixth and tenth) differential classA log-domain lowpass and bandpass ladder filter topologies. The designs are elliptically approximated and were obtained by means of an appropriately extended version of the XFILTER filter compiler. The non-desirable effect of the BJT finite beta is shown; circuit mo...

This paper presents simple method for the narrowband low-pass FIR (Finite Impulse Response) filter design. The method is based on the IFIR (Interpolated FIR) structure where the model filter is the ST (Stepped Triangular) impulse response filter cascaded with the simple compensator.

The design of linear image filters based on properties of human visual perception has been shown to require the minimization of criterion functions in both the spatial and frequency domains. We extend this approach to continuous filters of infinite support. For lowpass filters, this leads to the concept of an ideal lowpass image filter that provides a response that is superior perceptually to t...

The structure multivector is a new approach for analyzing the local properties of a two-dimensional signal (e.g. images). It combines the classical concepts of the structure tensor and the analytic signal in a new way. This has been made possible by using a representation in the algebra of quaternions. The resulting method is linear and of low complexity. The filter-response includes local phas...

Two algorithms for constructing a class of compactly supported complex tight wavelet frames with conjugate symmetry are provided. Firstly, based on a given complex refinable function φ, an explicit formula for constructing complex tight wavelet frames is presented. If the given complex refinable function φ is compactly supported conjugate symmetric, then we prove that there exists a compactly s...

| This paper examines the potential uses of interband leakage in image coders based on subband decomposition. The approach taken is to use the lowpass subband to predict the signal behavior in the other bands. This information is then used to both inform the coder/decoder as to likely locations for signi cant energy in the highpass bands, and to form a di erence signal that can be coded at a lo...

Introduction During the first year, infants are highly attuned to suprasegmental aspects of speech. This sensitivity may be exploited in the infant’s segmentation of the speech stream into clausal units. Hirsh-Pasek, Kemler Nelson, Jusczyk, Wright Cassidy, Druss and Kennedy (1987) examined young infants’ sensitivity to the pauses and other suprasegmental cues that coincided with clausal boundar...

When any earthquake occurs, the possibility that it might be a foreshock increases the probability that a larger earthquake will occur nearby within the next few days. Clearly, the probability of a very large earthquake ought to be higher if the candidate foreshock were on or near a fault capable of producing that very large mainshock, especially if the fault is towards the end of its seismic c...

ETRI Journal, Volume 26, Number 4, August 2004 In this paper we present a new current-mode electronically tunable universal filter using only plus-type current controlled conveyors (CCCII+s) and grounded capacitors. The proposed circuit can simultaneously realize lowpass, bandpass, and highpass filter functions— all at high impedance outputs. The realization of a notch response does not require...